Annotations: 4AYA

Crystal structure of ID2 HLH homodimer at 2.1A resolution

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Ras	e4ayaB1	A: a/b three-layered sandwiches	X: Globin-like	H: Flavoproteins/Phosphotyrosine protein phosphatases-like	T: (Phosphotyrosine protein) phosphatases II	F: Ras	ECOD (v294.1)
A	Ras	e4ayaA1	A: a/b three-layered sandwiches	X: Globin-like	H: Flavoproteins/Phosphotyrosine protein phosphatases-like	T: (Phosphotyrosine protein) phosphatases II	F: Ras	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	4.10.280.10	Few Secondary Structures	Irregular	MYOD Basic-Helix-Loop-Helix Domain, subunit B	Helix-loop-helix DNA-binding domain	CATH (4.3.0)
A	4.10.280.10	Few Secondary Structures	Irregular	MYOD Basic-Helix-Loop-Helix Domain, subunit B	Helix-loop-helix DNA-binding domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00010	Helix-loop-helix DNA-binding domain (HLH)	Helix-loop-helix DNA-binding domain		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	DNA-BINDING PROTEIN INHIBITOR ID-2	molecular function inhibitor activity molecular function regulator activity transcription regulator inhibitor activity protein binding binding protein dimerization activity transcription factor binding RNA polymerase II-specific DNA-binding transcription factor binding DNA-binding transcription factor binding transcription corepressor activity transcription regulator activity transcription coregulator activity transmembrane transporter binding	developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development cellular response to stimulus cellular response to metal ion cellular response to chemical stimulus response to lithium ion cellular response to lithium ion response to stimulus developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development cellular response to stimulus cellular response to metal ion cellular response to chemical stimulus response to lithium ion cellular response to lithium ion response to stimulus response to metal ion response to chemical cellular process behavior thigmotaxis regulation of cellular process cellular developmental process regulation of developmental process negative regulation of biological process regulation of cell differentiation neurogenesis neuron differentiation cell differentiation regulation of dopaminergic neuron differentiation negative regulation of cellular process negative regulation of dopaminergic neuron differentiation negative regulation of cell differentiation regulation of biological process dopaminergic neuron differentiation negative regulation of developmental process biological regulation nervous system development generation of neurons negative regulation of neuron differentiation regulation of neuron differentiation regulation of biosynthetic process positive regulation of biological process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process positive regulation of macromolecule biosynthetic process regulation of gene expression positive regulation of metabolic process biosynthetic process positive regulation of gene expression positive regulation of biosynthetic process regulation of macromolecule biosynthetic process metabolic process positive regulation of macromolecule metabolic process macromolecule metabolic process regulation of metabolic process positive regulation of cellular process cell population proliferation regulation of cell population proliferation neural precursor cell proliferation regulation of neural precursor cell proliferation cardiac chamber morphogenesis heart morphogenesis ventricular septum development anatomical structure morphogenesis cardiac septum development cardiac septum morphogenesis ventricular septum morphogenesis cardiac chamber development membranous septum morphogenesis animal organ morphogenesis cardiac ventricle development negative regulation of muscle cell differentiation muscle cell differentiation muscle structure development regulation of muscle cell differentiation homeostatic process hemopoiesis cell development erythrocyte differentiation multicellular organismal-level homeostasis myeloid cell differentiation immune system process homeostasis of number of cells myeloid cell homeostasis enucleate erythrocyte differentiation erythrocyte homeostasis digestive system development tube development endodermal digestive tract morphogenesis digestive tract development tube morphogenesis digestive tract morphogenesis cellular response to stress response to stress cellular senescence rhythmic process circadian regulation of gene expression circadian rhythm mammary gland epithelial cell differentiation epithelium development mammary gland development gland development epithelial cell differentiation involved in mammary gland alveolus development tissue development mammary gland lobule development epithelial cell differentiation mammary gland epithelium development mammary gland alveolus development response to light stimulus entrainment of circadian clock response to external stimulus regulation of circadian rhythm photoperiodism response to radiation response to abiotic stimulus entrainment of circadian clock by photoperiod regulation of cell development positive regulation of developmental process positive regulation of cell differentiation regulation of immune system process regulation of multicellular organismal process regulation of multicellular organismal development regulation of myeloid cell differentiation regulation of erythrocyte differentiation positive regulation of erythrocyte differentiation positive regulation of myeloid cell differentiation regulation of hemopoiesis metanephros development kidney development renal system development regulation of smooth muscle cell proliferation positive regulation of cell population proliferation smooth muscle cell proliferation positive regulation of smooth muscle cell proliferation muscle cell proliferation circadian behavior locomotory behavior rhythmic behavior locomotor rhythm myeloid leukocyte differentiation regulation of leukocyte differentiation mononuclear cell differentiation positive regulation of hemopoiesis regulation of macrophage differentiation positive regulation of immune system process positive regulation of cell development macrophage differentiation regulation of myeloid leukocyte differentiation positive regulation of myeloid leukocyte differentiation positive regulation of macrophage differentiation positive regulation of multicellular organismal process positive regulation of leukocyte differentiation leukocyte differentiation RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process transcription by RNA polymerase II negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of transcription by RNA polymerase II negative regulation of DNA-templated transcription negative regulation of transcription by RNA polymerase II negative regulation of metabolic process primary metabolic process nucleobase-containing compound biosynthetic process nucleic acid metabolic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process regulation of DNA-templated transcription negative regulation of RNA metabolic process fat cell differentiation positive regulation of fat cell differentiation regulation of fat cell differentiation cell activation natural killer cell activation lymphocyte differentiation lymphocyte activation leukocyte activation natural killer cell differentiation head development olfactory lobe development forebrain development brain development central nervous system development olfactory bulb development telencephalon development white fat cell differentiation regulation of neurogenesis regulation of gliogenesis regulation of nervous system development negative regulation of neurogenesis gliogenesis negative regulation of nervous system development regulation of glial cell differentiation negative regulation of gliogenesis negative regulation of cell development negative regulation of oligodendrocyte differentiation negative regulation of glial cell differentiation oligodendrocyte differentiation glial cell differentiation negative regulation of multicellular organismal process regulation of oligodendrocyte differentiation cardiac conduction system development bundle of His development cardiac muscle tissue development striated muscle tissue development ventricular cardiac muscle tissue development muscle tissue development His-Purkinje system development connective tissue development adipose tissue development adult locomotory behavior adult behavior B cell activation B cell differentiation regulation of lipid metabolic process lipid metabolic process regulation of osteoblast differentiation negative regulation of osteoblast differentiation osteoblast differentiation ossification system process circulatory system process regulation of blood pressure positive regulation of blood pressure regulation of biological quality blood circulation epithelial cell proliferation mammary gland epithelial cell proliferation regulation of leukocyte activation regulation of cell activation negative regulation of hemopoiesis negative regulation of leukocyte differentiation negative regulation of lymphocyte differentiation negative regulation of leukocyte activation negative regulation of lymphocyte activation regulation of B cell differentiation regulation of B cell activation negative regulation of B cell activation negative regulation of B cell differentiation regulation of lymphocyte differentiation negative regulation of cell activation negative regulation of immune system process regulation of lymphocyte activation neuron fate commitment cell fate commitment anatomical structure maturation cell maturation developmental maturation cell morphogenesis involved in neuron differentiation cell morphogenesis neuron development oligodendrocyte development glial cell development astrocyte differentiation positive regulation of DNA-templated transcription positive regulation of RNA metabolic process positive regulation of RNA biosynthetic process embryonic organ morphogenesis embryonic morphogenesis embryo development embryonic digestive tract morphogenesis embryonic organ development embryonic digestive tract development negative regulation of gene expression regulation of cell cycle phase transition regulation of cell cycle process cell cycle phase transition regulation of cell cycle G1/S phase transition cell cycle G1/S phase transition mitotic cell cycle regulation of mitotic cell cycle phase transition regulation of mitotic cell cycle regulation of G1/S transition of mitotic cell cycle mitotic cell cycle process cell cycle regulation of cell cycle G1/S transition of mitotic cell cycle cell cycle process mitotic cell cycle phase transition immune system development hematopoietic or lymphoid organ development Peyer's patch development mucosa-associated lymphoid tissue development positive regulation of nervous system development regulation of astrocyte differentiation positive regulation of gliogenesis positive regulation of neurogenesis positive regulation of astrocyte differentiation positive regulation of glial cell differentiation	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen protein-containing complex euchromatin membraneless organelle intracellular membraneless organelle chromatin chromosome

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR026052	DNA-binding protein inhibitor	Family
A, B	IPR036638	Helix-loop-helix DNA-binding domain superfamily	Homologous Superfamily
A, B	IPR011598	Myc-type, basic helix-loop-helix (bHLH) domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	: Q02363	acute myeloid leukemia Liver Cirrhosis, Experimental small cell lung carcinoma thyroid gland disease lymphoplasmacytic lymphoma malignant mesothelioma myopathy non-small cell lung carcinoma ovarian cancer psoriasis cystic fibrosis Emery-Dreifuss muscular dystrophy invasive ductal breast carcinoma malignant colon neoplasm MALT lymphoma acute myeloid leukemia Liver Cirrhosis, Experimental small cell lung carcinoma thyroid gland disease lymphoplasmacytic lymphoma malignant mesothelioma myopathy non-small cell lung carcinoma ovarian cancer psoriasis cystic fibrosis Emery-Dreifuss muscular dystrophy invasive ductal breast carcinoma malignant colon neoplasm MALT lymphoma nasopharyngeal carcinoma oligodendroglioma pancreatic ductal adenocarcinoma skin disease astrocytic tumor esophageal adenocarcinoma juvenile dermatomyositis lung adenocarcinoma malignant ependymoma medulloblastoma osteosarcoma pituitary cancer small cell carcinoma B-cell chronic lymphocytic leukemia Duchenne muscular dystrophy glioblastoma large cell medulloblastoma

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.